.page-contact {
  --contact-panel-bg: var(--deep-700);
  --contact-line: rgba(159, 242, 233, 0.2);
  --contact-card-shadow: 5px 5px 0 0 var(--mist-200);
}

.page-contact img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-contact a {
  overflow-wrap: anywhere;
}

/* 首屏 */
.page-contact .contact-intro {
  max-width: 68ch;
  padding: 26px 0 0;
}

.page-contact .contact-intro h1 {
  margin: 12px 0 16px;
  font-size: clamp(1.85rem, 7.2vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-contact .contact-intro .lead {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--deep-700);
}

.page-contact .contact-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-jump a {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--mist-200);
  border-radius: 999px;
  background: var(--paper-50);
  color: var(--deep-700);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color 220ms var(--ease-out), color 220ms var(--ease-out);
}

.page-contact .contact-jump a:hover,
.page-contact .contact-jump a:focus-visible {
  border-color: var(--coral-500);
  color: var(--coral-700);
}

/* 两列结构 */
.page-contact .contact-layout {
  display: grid;
  gap: 34px;
  margin-top: 42px;
  align-items: start;
}

.page-contact .contact-main {
  order: 2;
  min-width: 0;
  display: grid;
  gap: 60px;
}

.page-contact .contact-panel {
  order: 1;
  min-width: 0;
}

/* 联系信息面板 */
.page-contact .contact-panel {
  padding: 24px 22px 22px;
  border: 1px solid var(--deep-900);
  border-radius: 4px;
  background: var(--contact-panel-bg);
  color: var(--paper-50);
  box-shadow: var(--contact-card-shadow);
}

.page-contact .panel-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-contact .panel-title {
  margin: 0 0 18px;
  font-size: 1.375rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper-50);
}

.page-contact .panel-rows {
  margin: 0;
  padding: 0;
}

.page-contact .panel-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 0;
  border-top: 1px solid var(--contact-line);
}

.page-contact .panel-row:last-child {
  border-bottom: 1px solid var(--contact-line);
}

.page-contact .panel-row dt {
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--cyan-200);
}

.page-contact .panel-row dd {
  margin: 0;
  min-width: 0;
  max-width: 100%;
  font-size: 0.875rem;
  line-height: 1.5;
  text-align: right;
  color: var(--paper-50);
}

.page-contact .mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
  overflow-wrap: anywhere;
}

.page-contact .panel-note {
  margin: 18px 0 20px;
  padding-left: 14px;
  border-left: 3px solid var(--coral-500);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--cyan-200);
}

.page-contact .panel-links {
  display: flex;
  gap: 18px;
  margin: 16px 0 0;
  font-size: 0.8125rem;
}

.page-contact .panel-links a {
  color: var(--cyan-200);
  text-decoration: none;
  border-bottom: 1px solid var(--contact-line);
  padding-bottom: 2px;
}

.page-contact .panel-links a:hover,
.page-contact .panel-links a:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* 章节导语 */
.page-contact .section-lead {
  max-width: 66ch;
  margin: 0 0 20px;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--deep-700);
}

/* 三步流程 */
.page-contact .flow-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-contact .flow-item {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--mist-200);
}

.page-contact .flow-item:last-child {
  border-bottom: 1px solid var(--mist-200);
}

.page-contact .flow-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--coral-700);
  text-align: center;
}

.page-contact .flow-item::after {
  content: "";
  position: absolute;
  left: 25px;
  top: 48px;
  bottom: 0;
  width: 1px;
  background: var(--mist-200);
}

.page-contact .flow-item:last-child::after {
  display: none;
}

.page-contact .flow-title {
  margin: 0 0 8px;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--ink-900);
}

.page-contact .flow-body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--deep-700);
}

.page-contact .contact-figure {
  margin: 26px 0 0;
}

.page-contact .figure-caption {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--grid-400);
}

/* 五类问题 */
.page-contact .kind-list {
  display: grid;
  gap: 10px;
}

.page-contact .kind-list .expander {
  border: 1px solid var(--mist-200);
  border-left: 3px solid var(--cyan-400);
  border-radius: 3px;
  background: var(--paper-50);
  box-shadow: 3px 3px 0 0 var(--mist-200);
}

.page-contact .kind-list .expander[data-open] {
  border-left-color: var(--coral-500);
}

.page-contact .kind-list .expander-trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  width: 100%;
  padding: 15px 16px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.page-contact .kind-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink-900);
}

.page-contact .kind-list .expander-mark {
  margin-left: auto;
  color: var(--coral-700);
}

.page-contact .kind-list .expander-panel {
  padding: 0 16px 16px;
}

.page-contact .kind-list .expander-panel p {
  margin: 0;
  max-width: 64ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--deep-700);
}

/* 版本信息 */
.page-contact .version-rows {
  display: grid;
  gap: 1px;
  margin: 0;
  border: 1px solid var(--mist-200);
  background: var(--mist-200);
  border-radius: 3px;
  overflow: hidden;
}

.page-contact .version-row {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--paper-50);
}

.page-contact .version-key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grid-400);
}

.page-contact .version-val {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--ink-900);
}

.page-contact .version-hint {
  margin: 22px 0 10px;
  font-size: 0.9375rem;
  color: var(--deep-700);
}

.page-contact .mono-sample {
  display: inline-block;
  max-width: 100%;
  margin: 0;
  padding: 11px 15px;
  border-left: 3px solid var(--coral-500);
  border-radius: 3px;
  background: var(--deep-900);
  color: var(--cyan-200);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
}

.page-contact .version-where {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--deep-700);
}

.page-contact .version-where a {
  color: var(--coral-700);
  text-decoration: none;
  border-bottom: 1px solid var(--coral-500);
}

/* 进度回看 */
.page-contact .progress-card {
  padding: 26px 22px;
  border: 1px solid var(--deep-900);
  border-radius: 4px;
  background: var(--indigo-600);
  color: var(--paper-50);
  box-shadow: var(--contact-card-shadow);
}

.page-contact .progress-card p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 0.9375rem;
  line-height: 1.82;
}

.page-contact .progress-card p:last-child {
  margin-bottom: 0;
}

.page-contact .progress-link {
  display: inline-block;
  margin-left: 4px;
  color: var(--cyan-200);
  text-decoration: none;
  border-bottom: 1px solid var(--contact-line);
}

.page-contact .progress-link:hover,
.page-contact .progress-link:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* 地址与地区 */
.page-contact .place-grid {
  display: grid;
  gap: 26px;
}

.page-contact .place-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .place-list li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--mist-200);
}

.page-contact .place-list li:first-child {
  border-top: 1px solid var(--mist-200);
}

.page-contact .place-key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--grid-400);
}

.page-contact .place-val {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--ink-900);
}

.page-contact .place-note {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--deep-700);
}

/* 桌面布局 */
@media (min-width: 640px) {
  .page-contact .version-row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

  .page-contact .place-list li {
    grid-template-columns: 100px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-intro {
    padding-top: 34px;
  }

  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 1fr) 344px;
    gap: 52px;
    margin-top: 50px;
  }

  .page-contact .contact-main {
    order: 1;
    gap: 68px;
  }

  .page-contact .contact-panel {
    order: 2;
    position: sticky;
    top: calc(var(--top-h) + 26px);
    padding: 26px 24px 24px;
  }

  .page-contact .place-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.88fr);
    gap: 34px;
    align-items: start;
  }
}
<<<END>>>